Specific gravity: 6.56
Hardness: 2 to 3
Colour: White to bright yellow, or greyish-green, grey; light yellow to colourless in transmitted light
Solubility: Readily soluble in acids with effervescence
Beyerite is a rare secondary mineral in hydrothermal mineral deposits and
granite pegmatites, formed by alteration of
bismuth-bearing sulfides and sulfosalts and associated with
preisingerite, pucherite, eulytine, namibite,
clinobisvanite, bismutotantalite, bismuthinite and
The type locality is Schneeberg, Erzgebirge, Saxony, Germany.
In three pegmatites in south-central Colorado, USA (Mica Lode and School Section deposits, Fremont county, and Meyers Ranch body, Park county), beyerite is inter-grown with bismutite. These minerals are supergene alterations of late, hydrothermal, metallic minerals, native bismuth, bismuthinite, and various bismuth-bearing sulfo-salts.